Buffing wheel and method of making it



April 16, 1940.

HE. HARGY. SR

BUFFING WHEEL AND METHOD OF MAKING IT Filed April 10, 1939 INVENTOR.

H 1; Ha! .S'r BY W 'Z WQZZM ATTORNEYS.

Apr. 1c, 1940 other; I 4

BUFFING WHEEL AND METHOD OF MAKING l'l Harry E. Hargy, 8n, Sycamore Township, Hamilton County, Ohio Application April 10, 1939. Serial No. 267,084

flClaims.

I The present invention relates to buiiing wheels which are particularly adapted to finish the surface of metals or the like.

It is an object of the invention to provide a method and means of producing a bumng wheel inherently capable of presenting a series of rigid undulations around itsperipheral surface when subjected to high rotational speeds and under severe working strains. Another object of my invention is to provide a .a wheel having a cross-buillng action, that. is,

an actionproduced by the material at the periphery of the wheel striking the work'at an angle to the plane of rotation of said wheel coincident with a reciprocating back and forth motion upon the surface of the work transverseiy of the plane of wheel rotation.

A further object of the invention is to provide an economical and eflicient means for producgo ing a bufling wheel having its entire working surface formed in sinuous curves.

A still further object -of the invention is to provide a means for reenforcing the bufllng wheel comprising my invention.

Other objects will be apparent from the following specification and drawing, in which:

Fig. l is a side elevational view'of my, buiflng wheel.

Fig. 2 is a perspective view of the buiiing 30 wheel in an intermediate stage of manufacture.

Fig. 3 is a plan view of a disc comprising the 1 wheel.

Fig. 4 is a plan view of a distorted disc which is provided with a v-shaped sector.

Fig. 5 is a plan view of a distorted disc having a V-shaped opening therein.

Fig. 6 is a central cross-sectional view showing a means for mounting three sections of my bufiing wheel.

Fig. 7 is a perspective view of a reenforcing plate which may be used with my bufling wheel.

The embodiment of my bufling wheel may be used either singly or as a unit containing more than one wheel. When I employ a number of 4s buffing wheels as a unit, I shall hereafter refer to each wheel as a section, but for general purposes the terms can be used interchangeably. My bufii'ng wheel 10 comprises a plurality of superimposed discs ll made from fabric, paper, so fibrous material, or other substance suitable for bufling' purposes. The disc is provided with a slit I2 (Fig. 3) which extends inwardly from the periphery of the disc and is preferably disposed along a radial line of the .disc. As indicated II in Fig. 5, the opposed edges II and ll of the disc are then spread circumferentially apart to dis tort said disc from its normal plane, suchasby an undulation IS.

A number of distorted discs formed as hereinbefore set forth are superimposed one upon I the other, as indicated in Fig. 2, so that the V- shaped openings I'l formed therein are disposed about the wheel in other than transverse alignment. When the desired thickness of buiilng .wheel has been formed by superimposing the 10 discs, the stack so formed is provided with a means for securing the discs of the stack together such as an eccentric row'of stitches l8.

It will therefore be understood that the linear peripheral edge of the bufdng wheel has been 15 increased so that thecircumference of the composite wheel is greater than the circumference of its individual discs. This increase of circumference in the finished wheel results in the forma tion of a series of undulations being formed in go the peripheral working surface of the wheel which extend inwardly therefrom to its center. When the wheel is rotated at high speed, the

material therein tends to seek a flat position at right angles to the rotation thereof, but because of the increased circumference of the wheel, a series of sinuous curves is produced upon its peripheral working surface.

As shown in Fig. 4 the v-shaped portion II, formed in the disc by distorting it, may be closed by means of a sector It! which overlaps the edges of the opening and may be sewn or adhesively fastened to the disc along said edges. I contemplate that a distorted disc so formed may be employed as a cover for both sides of a stack of discs having V-shaped openings therein and a row of stitching used to secure the discs and covers together. Further, the disc shown in Fig.

4 may also be used to make a complete bufling wheel. 6

A buffing wheel so formed may be used either singly or a number of them may be fastened together as a unit as shown in Figs. 1 and 6. As shown in Fig. 6, three bufling wheel sections are coaxially mounted for rotation on a driven shaft 20 and are separated from each other by means of spacers 2|. The spacers may be of any thickness less than the transverse distance between the outer edges of opposite undulations formed in the wheels provided, as shown in Fig. 6, the similarly disposed undulations of the sections are positioned in transverse alignment. By' spacing the sections apart by a distance not greater than the transverse distance between the outer edges of opposite undulations, full surface coverage of the work is provided by a unit of bufling wheels so that said wheels need not be moved transversely of the plane of rotation of said wheels. This function is particularly useful on high speed automatic machinery. Because of the sinuous formation of the wheel and the fact that it may be spaced a substantial distance from adjacent wheels, considerable air is brought to the working surface of the wheel to prevent said wheel from burning or becoming scorched during operation. Another advantage of my bufling wheel is due to its increased peripheral working surface, as it is capable of bufling a surface twice the size of the surface bufled by former wheels of the same thickness. Further, its increased striking force on the work and its cross-cutting action is of great merit in bufllng certain types of metal surfaces.

When wheels of large diameter are used, I

prefer to employ rigid spacers 22 (Figs. 6 and 7) which have undulations 23 formed therein which conform to the undulations in the vertical sides of my wheel. The plates are secured to both sides of the wheel by means of the conventional threaded shaft 24 and nut 25 positioned on the driven shaft 20. In positioning the plates on the shaft, the undulations in the plate are disposed so as to engage similar undulations in the wheel. As shown in Fig. 6, the rigid spacers are positioned on either side of a three-sectioned bufling wheel. It is contemplated that the spacer may be positioned between a number of buffing wheel sections, on either side of a single bufiing wheel, or in any other manner which will tend to space and reenforce the bufiing wheel to which it is fastened.

What is claimed is':

l. A bufiing wheel comprising a plurality of superimposed discs, each disc having a radial slit formed therein and the opposed edges of the slit'spread apart to form a V-shaped opening therein, the openings in adjacent discs being disposed about the wheel in other than transverse alignment, a circular cover positioned on both sides of the superimposed discs and provided with a radial slit, a sector, the opposed edges of the slit spread apart and fastened to the edges of the sector, and a row of stitching for securing the discs and covers together whereby the peripheral edge of each disc and cover is distorted from its normal plane into a series of peripheral edge undulations disposed on opposite sides of the normal plane of each disc and cover.

2. A bufling wheel comprising a plurality of superimposed discs, each disc having a radial slit formed therein and the opposed edges of the slit spread circumferentially apart to form a V-shaped opening therein, the openings in adjacent discs being disposed about the wheel in other than transverse alignment, and means for securing the discs together.

3. A bumng' wheel comprising a plurality of superimposed discs, each disc having a slit extending inwardly from the periphery thereof, and having the opposed edges of the slit spread circumferentially apart to distort the disc from its normal plane, and means for securing the distorted discs together.

4. A bufling wheel comprising a plurality of superimposed discs, each disc having a slit therein and distorted from its normal plane to increase its linear, peripheral edge, means for securing the discs together to thereby present a series of peripheral undulations disposed on opposite sides of the central transverse plane of the wheel.

5. A buffing wheel comprising a plurality of superimposed discs, means for distorting each disc from its normal plane to increase the linear, peripheral edge thereof, and means for securing the discs together to thereby increase the circumference of the peripheral working surface of the wheel.

6. A bufling wheel comprising a plurality of superimposed discs, each disc having a slit extending inwardly from the periphery thereof, and having the opposed edges of the slit spread apart to distort the disc from its normal plane, a sector fastened to the edges of the slit, and means for securing the distorted discs together.

7. A buifing wheel having a number of coaxially disposed sections and each section comprising a plurality of superimposed discs, each disc having a slit therein and distorted from its normal plane to thereby increase its linear, peripheral edge, means for securing the discs together to thereby present a series of peripheral undulations disposed on opposite sides of the central transverse plane of the section, and means for spacing the sections apart by a distance not greater than the transverse distance between outer edges of opposite undulations, the similarly disposed undulations of the sections being positioned in transverse alignment.

8. A buffing wheel comprising a plurality of superimposed discs, means for distorting each disc from its normal plane to increase the linear, peripheral edge thereof, means for securing the discs together to thereby present a sinuous peripheral working surface for the wheel, end plates for the wheel having undulations therein which conform to the undulations inthe vertical sides of the wheel, and means for rigidly securing the plates to the wheel so that undulations in the plate engage similar undulations in the wheel.

9. The method of making a bufiing wheel whichcomprises forming a number of discs from fibrous' material, placing a radial slit in each disc, circumferentially spreading apart the edges of the slit to distort each disc from its normal plane, superimposing a number of said distorted discs to form a stack, and stitching the stack together.

HARRY E. HARGY, SR. 

